PTFE lined pipes

product description:

The steel lining four fluorine pipes and pipe fittings is currently all in the pipe anticorrosion the most anticorrosive pipes and pipe fittings. In addition to the melting of alkali metal, element fluorine and three fluoride chlorine resistant to almost any kind outside, any concentration of acid, alkali, salt, the oxidant, organic solvent and all other strong corrosive chemical corrosion of medium, can be in 193 ℃--250 ℃ + work normally under, and maintain long-term anti-aging performance. Shell for seamless steel tube, ends welding flanges (or live set of flange) tube lined with four fluorine.

Second, production process:

The first kind of: PTFE liner straight pipe and pipe fittings

Commonly known as loose liner tube, fittings. This process is turning into a bar of PTFE membrane, winding sintering forming. Used in atmospheric pressure, positive pressure transmission line (such as "three wastes" treatment of pipeline, etc) to be used for a load of the line (such as pump into the exit by divide, and suddenly cooling, etc can produce or negative pressure of the line).

Size specification: DN25-500 mm

Using temperature:-40-180 DHS C

Use pressure: 1.6 MPa

The second type: PTFE tight straight line and pipe fittings

Commonly known as bound steel wire in tight liner tube, fittings.

Manufacturing process: first the floors PTFE film around in mold, again will steel wire (Ø 0.5 1 mm) spiral winding in PTFE film to, in steel wire winding outside again after several layer PTFE thin, finally in the form of a furnace. In this production process of PTFE liner tube, inside sleek, due to the volume of the outer wall of steel wire and the power play, form a spiral corrugated line.

Will it within the steel pipe line, and in the PTFE liner tube, and PTFE liner in the outer wall of pipeline and steel tube wall in the space between the filled the filling resin (not the residual air). The filling resin and pipe binder can close together. At the same time, it can tightly wrapped in a spiral of PTFE liner tube on the outside. After filling resin curing, formed and the outer wall of the lining of the spiral corrugated phase bite circles. This structure, similar to the nuts and bolts of the union. On one hand it can make PTFE liner of heat bilges cold shrink effectively limit and compensation; On the other hand, use the stiffness of the steel wire obviously improve the ability of PTFE liner negative pressure resistance.

Size specification: DN25-200 mm

Working temperature:-180 DHS C

Working pressure: 0.5 1.6 MPa

The third kind: PTFE push (crowded) pressure pipe tight straight line

Commonly known as push (crowded) pressure straight pipe lining, the 90 s widespread use of the developed countries of the pipe.

Manufacturing process: first imported PTFE powder, push (crowded) pressure into the pipes and will it forced pulled into a seamless steel tube (liner tube diameter steel pipe diameter is slightly higher than the 1.5 2 mm), forming no clearance tight line. In order to eliminate the pressure, to put it in the oven, heating to 180 DHS C with constant temperature, adapting in the 180 DHS C below the temperature in use. At the same time, push (crowded) pressure pipe axis

To the tensile strength than coil pipe is obvious. The pipeline has the best resistance, ability is negative pressure.

Size specification: DN25-200 mm

Using temperature: 100-180 DHS C

Role stress: 0.09-1.6 MPa

The tube fittings using fluorine plastic (PFA, FEP and PVDF, PTFE) as raw material, by moulding and forming, the thickness of the lining 3-4.5 mm, has excellent resistance to the positive and negative pressure ability.

Size specification: DN25-200 mm

Using temperature: 100-180 DHS C (PFA)

100 160 DHS C (FEP)

100 120 DHS C (PVDF)

Use pressure: 0.09-1.6 MPa

Iv: reinforced PTFE liner tube

At present, the domestic push (crowded) pressure PTFE pipe of the maximum diameter 200 mm, PTFE liner steel wire wrapped around in tube the ideal size and only 200 mm. In order to solve DN25-500 mm straight pipe and tube fittings lining is, the problem of negative pressure resistance, we adopt the following lining process: in PTFE loose line tube, according to a certain set of outsourcing PTFE distance metal support ring (Ø 6-16 mm), wall make corrugated, on the one hand, fixing ring; On the other hand make PTFE liner of heat bilges cold shrink to get a better compensation, make the pipe with good characteristics of positive and negative pressure ability.

Size specification: DN25-500 mm

Using temperature: 100-180 DHS C

Use pressure: 0.09-1.6 MPa